Door attachment



(No Model.)

F. W. GREGG.

DOOR ATTACHMENT.

No. 439,942. Patented Nov. 4, 1890.

UNITED STATES PATENT OFFICE.

FRANK 'W. GREGG, OF BOSTON, MASSACHUSETTS.

DOOR ATTACHMENT.

SPECIFICATTON forming part of Letters Patent No. 439,942, dated November 4, 1890.

Application filed March 8, 1890.

Serial No. 343,113. (No model.)

To all whom it may concern.-

Be it known that I, FRANK W. GREGG, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Deer Attachments, of which the following, taken in connection with the accompanying drawings, is a specification.

The object of my invention is to produce an attachment for doors whereby I am enabled to dispense with the door-sill or threshold now in ordinary use, the attachment being operated automatically, so that when the door is closed it will press upon the carpet or floor, but will be raised therefrom as soon as the door commences to open. The invention consists of a U-shaped piece or plate of thin metal sufficiently wide to embrace the door and levers attached to the door and to the plate, said levers being operated by a push-bar, so that when the door is closed the push-bar is pressed in by a stud on the door-jamb and forces the plate down, but when the door is opened the plate is drawn up by a spring, as hereinafter fully described, and pointed out in the claims.

Referring to the accompanying drawings,

Figure 1 represents an elevation of a portion of a door and jambs having an attachment embodying my invention. Fig. 2 is a vertical longitudinal section through the door in a closed position and the attachment down and resting upon the floor. Fig. 3 is a similar section showing the door in an open position with the attachment raised clear of the floor. Fig. 4 is a View of the under side of the attachment. Fig. 5 is a vertical longitudinal section through the door attachment, drawn to a somewhat larger scale. Fig. 6 is an end view of the attachment, showing part of the door in section.

Areprcsents the door, B the jambs, and O the floor-line. In the lower portion of the door is formed a groove or recess D, and on each side of the door I prefer to secure narrow strips of wood E; but when the door is of sufficient thickness these will not be required.

F is a U-shaped frame of metal closed at one end. This frame is secured to the under side of the door by two arms or levers G G,

each being at one end secured to lugs H on the metal frame F, and at the other end to the under side of the door by lugs I, fastened to the under side of the door by screws, openings f being formed in the bottom of the frame F, through which the screws are passed.

The two arms or levers G G are pivoted together at i, and are also connected at one end by a bell-crank lever J, securely fastened at its center to the arm or lever G, and its lower arm j is provided with a pin 7' that works in a slot g in the lever G. To the upper arm j is secured a screw-threaded eye K, through which a screw-threaded push-rod L passes. This rod is at its outer end formed with a button or enlargement Z, which, when the door is closed, comes into contact with a stud M on the door-jamb. (See Fig. 2.)

N is a spiral spring secured at one end to an eye m in a recess in the door, and at its other end to an eye f on the frame F.

Near the outer end of the frame F is a pin or stud P, that works in a corresponding recess formed in the door. This pin or stud acts as a guide for the frame as it is raised or lowered.

Q Q, are strips of metal bent to the form shown, (see Fig. 6,) which are secured to the door or to the wood strips E. These strips of metal form grooves or recesses q, in which the sides of the frame F pass, thus preserving a uniform appearance.

The operation is as follows: Supposing the door to be open, the frame F is then drawn up by the spiral spring N, as shown in Fig. 3. Now if the door be closed the button Zon the push-rod L will come into contact with the stud M on the door-jamb B, which will press the rod inward, thereby forcing the arm j of the bell-crank lever J backward, which, being fulcrumed at its center to the arm or lever G and its other arm j being connected to the arm or lever G, causes the two arms G G to be forced apart at that end, and as the ends of the levers are pivoted to the lugs H I and are also pivoted together the outer ends of the two arms are thrown down, thereby lowering the frame F. The distance the frame F is lowered can' be regulated, as required, by adj usting the push-rod L-that is, by turning the rod so that the buttonl will be moved forward or backward, as may be required.

It will be seen that by the employment of a door attachment, as above described, the ordinary door-sill or threshold can be dispensed With and the carpet continued from room to room. At the same time all draft and dust will be excluded When the door is shut and the attachment raised clear of the carpet when the door is opened.

What I claim as my invention is- 1. In combination with a door, a U-shaped frame F, arms or levers G G, secured to the frame and under side of the door by lugs H H I I, a bell-crank lever J, connecting the two arms or levers at one end, a screw-threaded eye K, pivoted to the upper arm of the bellcrank lever J, a push-rod L, and stud M on the door-jamb for lowering the frame when Witnesses:

CHAS. STEERE, EDWIN PLANTA. 

